Also joining the cast are Noah Taylor, recently seen as the villainous Locke on HBO’s Game Of Thrones, and High School Musical co-star Olesya Rulin. Taylor will play Johnny Royale, a prominent figure in the Powers underworld who acts as both antagonist and informant for the already-cast detective protagonist Deena Pilgrim and her as as-yet-uncast partner Christian Walker. Rulin has been cast as Calista, a street-wise youth who was central to the graphic novel’s first story arc.